Yes we can construct knowledge to education,learning a lesson.
If it goes to area data mining we got to have training set as model of knowledge construction. On machine learning , it uses unsupervise or supervise learning method.
On knowledge management its in the area of knowledge engineering where all information gather and train to be knowledgr.
Perhaps we should ask - can knowledge exist that is not constructed? I find it difficult to imagine that it can. For your autoethnography, are you asking whether you can create valid knowledge through this approach? My answer to this question is yes if you conduct the autoethography well and bracket the knowledge you create.
No, the knowledge is not something we create but it is matter we discover. Can we create knowledge about the earth, that it is flat? We discover what shape it is. We create the way we describe and process the knowledge but we should not misinterpret it with knowledge per se.